One of the reasons that classical composer and Jane Lang Professor of Music Gerald Levinson is drawn to the orchestra as a medium, he says, is that it has very rich possibilities. "There are lots of people playing lots of instruments that, together, form some very rich texture." Here, he discusses how his work often develops from "sound images" that occur to him, specifically the experience of composing Toward Light, which was commissioned and performed by the Philadelphia Orchestra for the dedication of its pipe organ. This film project is a collaboration between Pew Fellowships in the Arts and the Marketing Innovation Program. (Flash 8 or higher is required)